Process of making gas.



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1% UGG DICKE, OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO JACOB EDUARD GOLDSCHMID, OF FRANKFORT-ON-THEMAIN, GER

HAN Y.

PROCESS OF MAKHNG GIALS- Specification of Letters Patent.

Patented Dec. 25, 1906.

Application filed September 27, 1901. Serial No. 76.796.

gas-coal in retorts in the usual way and passing watengas through the retorts during the generation of the coal-gas.

llly invention relates more particularly to the regulation of the current of water-gas, with the object of preventing, as much as possible, the decomposition of the heavy hydrocarbons and of introducing only such quantities of water-gas as will not diminish the candle-power of the resulting mixed gas below the allowable limits. F or this purpose I begin to admit the water-gas immediately or soon after the beginning of the distillation, and I continue the operation until .118 n'iixture of heavy hydrocarbons and of light gases developed in the retort hasattained a ratio which willprevent the decomposition of the heavy hydrocarbons by the heat of the retorts without further dilution by water-gas. I have further found it to be advantageous to admit more water-gas during first part of the distillation and to diminish the quantity toward the end of it.

.Inway the amount of water-gas admitted amounts to from thirty per cent. to forty per cent. of the total amount of generated mixed gas.

I admit the water-gas during eriods varying from about one hour and a alf to three hours of the distillation period, and I regulate the admittance for different coals in ac cordance with the following rule: The ratio of the heavy hydrocarbons to the light gases is about one to nine from the end of the first quarter of an hour, one to fifteen at the end of the first hour, and one to twenty at the end of the second hour for ordinary coal, whereas Boghead coal yields about triple the amount of heavy gases. Now the ratio one to twenty is about the degree of dilution which will prevent the decomposition of the heavy hydrocarbons. The water-gas should therefore be regulated so that this dilution at.

least will be maintained during the whole process. It follows that it is best to admit -more water-gas at the beginning, calculating the absolute quantity of coal-gas developed, as well as its ratlo to the generated light gases.

In the case of ordinary coal, as above noted, the distilling operation in the retort develops during the first quarter of an hour one part of heavy hydrocarbons to nine parts of light hydrocarbons. Assuming these proportions, for the sake of comparison, to be represented by one hundred cubic feet of heavy hydrocarbons and nine hundred cubic feet of light hydrocarbons, my invention would contemplate the admission into there- Y tort during the initial period referred to of eleven hundred cubic feet of Watengas as a minimum. During the next three-quarters of an hour, as above noted, the distilling operation develops the same quantity of heavy hydrocarbons developed during the first quarter of an hour, but a larger quantity of light hydrocarbons. Again assuming, for the sake of comparison, the proportions of heavy hydrocarbons and light hydrocarbons developed during this second period of gas generation (one to fifteen) to be represented by one hundred cubic feet of heavy hydrocarbons and fifteen hundred cubic feet of light hydrocarbons, my invention would contemplate introducing during the second period referred to five hundred cubic feet of water-gas. It is to be noted, however, that inasmuch as the second period is three times as long as the first the amount of water-gas necessary to be admitted is proportionately less for equal time intervals in the second period than in the first, anda corresponding diminution is feasible during the next succeeding period of an entire hour, as will be readily understood. I have pointed out, however, that while the minimum admission of water-gas indicated must be substantially maintained, it is, nevertheless, feasible to increase that proportion up to a maximum of from thirty to forty per cent. of the total amount of generated mixed'gas, which is of obvious importance from a practical standpoint.

Having thus described my invention, what I claim is The process of making gas which consists in distilling coal in retorts, and diluting and protecting the heavy hydrocarbons incident to such distillation, by introducing into the 2 y ssjase Tetorts an amount of water-gas, which, to- In testimony whereofl have signed my name to this specification in the presence of two subscribing-witnesses.

HUGO DICKE.

gether with the amount of distilled light gases simultaneously present, shall bear the minimum ratio of twenty to one to said heavy hydrocarbons, whereby decomposition of said heavy" hydrocarbons is prevented; substantially as described.

' Witnessesz.

JEAN GRUND, CARL Gnome- 

